Boulay or du Boulay is a surname, and may refer to:
- Antoine Jacques Claude Joseph, comte Boulay de la Meurthe (1761–1840), French politician and magistrate
- César-Egasse du Boulay (died 1678), French historian
- Clair du Boulay, retired British expert in pathology and medical education
- Étienne Boulay (born 1983), Canadian footballer
- Francine Boulay-Parizeau (born 1953), former Canadian handball player
- Francis Robin Houssemayne Du Boulay (1920–2008), British medieval historian
- Henry Du Boulay (1840–1925), Archdeacon of Bodmin, Cornwall (1892–1923)
- Herménégilde Boulay (1861–1942), Canadian politician, farmer, manufacturer, merchant and trader
- Isabelle Boulay (born 1972), francophone Canadian pop singer
- James Houssemayne Du Boulay (1868–1943), British civil servant in India
- Joséphine Boulay (1869–1925), French organist and composer
- Mathieu Boulay (born 1987), Canadian footballer
- Olivier Boulay (born 1957), French automobile designer
- Shirley du Boulay, British author and biographer
Read more about Boulay: See Also